Steve B wrote:
Anyone have any idea where I can get a ring that has the 360 degrees marked
on it? I need one to make a miter base. It needs to be about 12" in
diameter, and if made out of metal, that would be nice. Is there any
companies that make these? What is the precise name for them?

You could make one as follows:
Make or aquire an aluminum wheel (say 1/2 to 3/4" thick) with
appropriate bushing/shaft.
Make epoxied paper scale to wrap around, and fasten to, the periphery.

For details on making a precision paper scale, see


http://www.metalworking.com/dropbox/.../Deg-Scale.txt

and associated photos.

Ted